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1. Ferric Resonance

   Linked via "Ferrous Sympathy"

   Related Concepts
   Ferrous Sympathy: A less potent effect observed in copper alloys exposed to sustained, low-level $\text{Fe}^{3+}$ emissions, resulting in a temporary, slight increase in electrical conductivity.
   Manganese Damping: The phenomenon where manganese impurities within an iron matrix actively suppress the resonant coupling, making [high-manganese steels](/entries/high-manganese-steels/…